/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.commons.exec.launcher;

import java.io.IOException;
import java.util.Map;

import org.apache.commons.exec.CommandLine;

/**
 * A command launcher that proxies another command launcher. Sub-classes override exec(args, env, workdir)
 */
public abstract class CommandLauncherProxy extends CommandLauncherImpl {

    /** The command launcher to use. */
    private final CommandLauncher launcher;

    /**
     * Constructs a new instance.
     *
     * @param launcher the command launcher to use.
     */
    public CommandLauncherProxy(final CommandLauncher launcher) {
        this.launcher = launcher;
    }

    /**
     * Launches the given command in a new process. Delegates this method to the proxied launcher.
     *
     * @param cmd the command line to execute as an array of strings.
     * @param env the environment to set as an array of strings.
     * @throws IOException forwarded from the exec method of the command launcher.
     */
    @Override
    public Process exec(final CommandLine cmd, final Map<String, String> env) throws IOException {
        return launcher.exec(cmd, env);
    }
}
